Design of a robust controller structure for a single-phase inverter operating in island mode within a micro-grid

In this work a single-phase inverter is modeled and a new robust control structure based on Posicast and Repetitive controllers is proposed within of an integral proportional-proportional configuration control. This control structure is proposed for inverter operation in island mode within a micro-grid. Its objective is propitiate a transient response underdamped with a small number of oscillations; As well as maintaining the waveform, amplitude and frequency of the voltage signal to be delivered to the load for this mode of operation of the inverter. In particular, the Posicast control is used to improve the transient response of the system and the repetitive controller is used to provide better rejection of disturbances. And proportional integral - proportional configuration control allows both controllers to be integrated into the same control structure.